Stylus pen



FIG. 1 is a front, right and bottom perspective view of a stylus pen showing our new design;

FIG. 2 is a rear, left and top perspective view thereof;

FIG. 3 is a front view thereof, a rear view thereof being a mirror image;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

CLAIM The ornamental design for a stylus pen, as shown and described. 